Sobriety Checkpoints
The traditional strategy for increasing perceived certainty of apprehension is to increase the frequency and visibility of drinking-and-driving enforcement, for example, by simply intensifying police enforcement in the form of short-term intensive checkpoints during holidays. Increasing the probability of arrest could translate into a higher perceived probability of detection and fewer accidents. At sobriety checkpoints, only motorists who are judged by police to have been drinking are asked to take a breath test. This approach greatly weakens the deterrent potential because experienced offenders believe (with some justification) that they can avoid detection.